bool operator==( const type_index& rhs ) const noexcept; | (1) | (since C++11) |

bool operator!=( const type_index& rhs ) const noexcept; | (2) | (since C++11) (until C++20) |

bool operator<( const type_index& rhs ) const noexcept; | (3) | (since C++11) |

bool operator<=( const type_index& rhs ) const noexcept; | (4) | (since C++11) |

bool operator>( const type_index& rhs ) const noexcept; | (5) | (since C++11) |

bool operator>=( const type_index& rhs ) const noexcept; | (6) | (since C++11) |

std::strong_ordering operator<=>( const type_index& rhs ) const noexcept; | (7) | (since C++20) |

Compares the underlying `std::type_info`

objects.

1-2) Checks whether the underlying

`std::type_info`

objects refer to the same type.
3-7) Compares the underlying

`std::type_info`

objects as defined by an implementation-defined ordering. The comparison is done by `type_info::before`

. The | (since C++20) |

rhs | - | another `type_index` object to compare to |

3-6)

`true`

if the types referred by the underlying `std::type_info`

objects are ordered by corresponding order, `false`

otherwise.
7)

`std::strong_ordering::equal`

if the underlying `std::type_info`

objects refer to the same type, otherwise `std::strong_ordering::less`

if `*this`

's underlying `std::type_info`

object precedes `rhs`

's in the implementation-defined ordering, otherwise `std::strong_ordering::greater`

.
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